Greetings,

According to this site:

http://pcdsh01.on.br/DecHV.html

http://pcdsh01.on.br/FusoBR_HVCorrente.htm

From the 2012-10-21 until 2013-02-17 the Brazilian Estates will be using summer time.

For example: the zone America/Sao_Paulo in the tzdata2012g says -3:00 and should be -2:00.

Thanks!